Loose-leaf ledger.



t150.347.628. PATBNTED MAB. 19, 1907.

` B.. B. WILSON.

LoosE LEAP LEDGER.

APPLIATION FILED 0OT.18. 1906.

' No. 847,628. j f f Tb ir/ZZ 'whom zit may concern: i

UNITED STATES..

lPATENT onrron RALPHB. WILSON, oF. cmd/teo, ILLI'Nois,

' citizen of theUnited States, and a resident of the city. ofiChicago ,in the county of Cookand l.State vof Illinois, have invent {.Qertainnetv and luseful Improvements' in vLoose-Leaf l. Binders; and I do hereby declare that the ollowing'is a full, clear, and 'exactl descrip-v tion ofthe same, referencebeing had .to the. lo

.accompanying drawings, .and .to the letters of reference married thereon, which form a part M `.curin'g`the same rigidly in place though per-v mitting the side sections free movement.

. ford-a construction wherein the ends of the clamping-plates are adapted to overlap each of this speciiication. j This invention relates to improvements in loose-leaf ledgersh'and more particularly to 'that' 'classof loose-leaf ledgers set forth in my prior .patent for ledger, issued- May 2,6, .1903,

While ledgers .have rheretofore bfen coni" structed having a collapsible closed back, it l D v.endsofvtlvle back, and many devices have been "j ".'constructedfor lthat urpose.

has been difficult to provide yfor closing. the' T bese devices .for .closing'the en s of the binder have pr ven expensive and sometimes have been- 'ob ctionable, owing to thesdifliculty of sey'lhe'object of'this invention is` to providea- `*ledger-back of the class described in which I 53.0.'

- ,means'for .the lateral clampingfplates'fandthey centraly back plate carries the actuating .also is provided at its -endwith a easing 1nvtegral therewith' in` which the transverselyturned ends of the clamping-plates telescope. .Itis a further object of the invention to afother within acasing rigidly secured upon members slide.

lthe central back -plate and 'having a rigid block :secured .therein on'which-said` end It is a -'further'. objectjot ythe'invention aff v'ford a' baclandendmember of very strong andrigid yet'extremely light; .eon struct1on adaptedfto permit large amplitude of adjustment of'- the clampin -plates to. vary the 'quantity of Aleaves he d therebetween and which isso constructed as to reduce the eX pense for constructionto a minimum.

' The inventlon cons`1sts' in the matters hereinafter described, and more fullvfpointed out and defined inthea pended claims, .Inthe drawings,. lillgure1 is avie'w .mele- Loose-LEAF yLEDeE'Fc.

Specification of Letters Patent.- Applicant ned october' 1s. 1906.. l'smalto'. 33ans.

y Patenteelnareh 191907.

and of somewhat less width are plates of the same thickness bent tof-afford .the .outer and the inner walls of a casing D D', closed at'the top andfo'pen at each end. In the bottom of' this -casing and on the outer side, flush with the back, are relatively `thick transverse bars a. and a", respectively, having rounded. edges and "of ,a length equal tothe 'width of said back section. "These afford. a finishgfor the 'ends of the back sectionaand stiffen said secy tion.transversely. -Said end bara is provided with a central notch,.as shown in Ifigs.

.1 and 2, and protruding therethrough is thel g angular'cnd. b'of a shaft B, vs'fhich-7 asshown, is journaled in suitable bearings b b2, secured` in longitudinal alinement kin themid- -dle of the back section. Said'shaftis of' a' length-.approzrimately equal to the length of 4.the back :section4 and is provided'. at dpp'osite ends beyond the bearings b b2 with ri ht and left screw-' threads, respectively, as i usual 'with this yclass of binders".y Secured. o- 'each yof said ends,'as shown -lis a comple'mei tallyy Iwhich v. l 4projecton opposite `sides-of.- the shaf and threaded nut B1". andfBz, wings frm afford means forpivotallyengaging "t ereto toggle-armsb3 and b4. Opposite'ly-di'sposed .lateral clamping-plates and C areslidably secured upon said-central back sections A',

'an d.. ea'ch', as shown, comprises a plate of metal vstamped to 4 afford inwardly-turned ends dto dwhich telescope' in said casing .broadback flange .c7 along the lower edge of loo i D D and an inwardly-turned relatively' each plate adjacent the'central back section, and which lits closely and slidesover' the edges Iof the same. .Said clamping-plates .are engaged to said back section in part by Vmeansof.saidtoggle-arms b3 and b4, which are vpiv'otally engaged.4 between said f flanges tion ot 'iside of the binder. is asecticntaken on 11ne 2f2 of 11..

and@J suitable late c?, parallel therewith,

plates and acting to engage the paper in'place.

TL opf; ration is asffollows: By inserting a suitable key through an aperturein said casing D the shaft may be rotated, moving the nuts oppositely on I the shaft ztoincrease or decrease the capacity of the binder depend- 'ent upon the direction of rotation. When rotated in either direction, the clampingplates necessarily move simultaneously and to a like extent, and the overlapped ends.

thereof -in the respective casing-guideways D and D slide freely outwardly or inwardly tol vary the capacity of the binder and are .held at all times firmly engaged to' the back section by said casing.. The lowerI edge of the inturnedends d d are cut away to pass over the end ofthe key or shaft; but it is uite obvious `that the slot is not exposed to t e ends of the casing to any appreciable extent even' when the binder is expanded to its greatest-(extent, inasmuch as said casings are nearly as long 'as the width of the hack `section Furthermore, inasmuch as said casings are centrally located at the endsv of said back dplate 'and are integral therewith and exten nearly the entire width thereof fan lserve to firmly engage 'the clamping- .plates thereof and obviate any tendency for the back sections to spring away'frorn the4 clamping-plates- Thebearings course be constructed in any suitable lmanner. As shown,however, the shaft at the inner end ofeach screw-threaded portion is f slightl reduced in diameter and' isfsupp'orted by earing-blocks 'b5 b",and straps of metal vb b2 are bent to thedesired shape to engage i around the'same and thelshaft, and the ends thereof are carried downwardly and-riveted to the back plate', as s hown'in Figs. 1 and 3.

' Obviously While I have .ShOWnhmY invert' clamping-plates permitted to'frictionally ention as provided with three sets of telescoping impaling-posts lthe binder is capable of considerable variaticn'in this respect, and in certain forms of binders the impalingposts maybe omitted, if desired, and the gage the margins of the paper,- and various j? details of construction may be varied without departing from the'principle of thijs'l'invention.

Iclaim as my invention- I H., i 1. A loose-leaf binder eir'ibraclng-r a `-centrally-curved back section, lateral clamping -`plates slidably .engaged therer'i, impahngposts secured thereto and s'lidable ltherewith', inturned ,overlapping ends on said clam inglates and a central transverse elongate( caslmg engaged 'on each end of said back plate .thfyadd greatly to the strength of the binder.-

Aengaged around the shaft and for the kscrew-shaft may' of" *,irrnly securing the shafts from longitudinal' amies@ and affording a housing for said overlapped endsof` the clamping-plates, said housings` having "an enlargement at the lower ends, a strengthening-bar extending through the housing, and means for'actuating saidelamping-plates. i

. 2. A ledger-binder of the class described embracing a curved back plate `ol" sheet metal, a transverse reinforcing-bar rigidly enga ,ed on 4each end thereof, a central elongate( transverse casing, on each end of the 4back plate and integral therewith and adjacent the reinforcing-bar, oppositely-slidable clamping-plates laterally engaged on the back. plate, inturned ends on said clampingplates adapted to project approximately lthrough and to overlap each other in said casing or housing, an actuating-shaft journaled longitudinally and centrally of said back plate, an angular end thereon projecting through-one of said housings and the overlapped ends of said.. clamping-plates and mechanism operated by said shaft yto shift said clamping-plates l 3. In a ldevice of the-class described a transversely-curved sheet-metal back plate. having a length approximately equal to the ,length ofthe .binder and in width approximately equaly to the .thickness of the binder in its most contracted form, a' right and left end threaded shaft journaled longitudinally at the lmiddle of said back plate, and reducedin diameter at equal distances from itsl ends, bearing-blocks adapted to support thel sam'eat the reduced portion, stra is )caring-bloclgs movement, clamping-plates shaped to alord an inturned flange a( jacent the back plate, .inturned ends on the clamping-plates, interoftlie'central back section, an elongated transverse housing or casing integral with the back plate and projecting into the binder and in which said ends of the binding-plate overlap.

4. In a ledger-binder a sheet-metal back section concave 'on the inner and convex on the outer side, rigidlysecured transverse reinforcing-bars one at each end of said section, and integral transverse housings at the ends of the back section and in which the reinforcing'lbars are rigidly secured.

' 5. :A pressed-metal back plate-of the class described having transverse inwardly-directedhousings integral therewith at each end,

said housingprovid'ed with an enlargement at "fone `end thereof and transverse bracing-bars engaged-1n said enlar ements.

6. A pressed-meta back plate ofthe class described having at eachlend an integral loo `ittin impaling-posts carried on the clamp` i transverse inwardl T-directed casing having parallel Walls, an a reinforcing-bar usli with the back on the. outer side and permanently secured. between said sides.

7. In a 'ledger-binder, a pressed-metal back plate having an integral housing at each end and the outer Wall of said housing turned outwardly to form an enlargement and a bar closely fitting said enlarged portion of the housing to strengthen the ends of said binder.

8;- A ledger-binder of' the class described comprising a back plate concaveon its inner side and convex on its outer side, a housing at each end of said back-section and ay strengtheIijug-ba-r rigidly inc-losed within the Walls of saldfjhousing.

9." In abinder of'the class described the combination with a back plate of side plates having inturned ends, a housing rigidly engaged at each end of the binder of uniform Widt-h approximately the height of the end lates land affording an enlarged passage beow the saine and a strengthening-bar engaged therein and firmly riveted thereto.

10. The combination with a pressed-metal back plate of clamping-plates movable therestrengthening-.bar ext-ending through each housing and providing a finish for each end of the back. l

l11. In a binder'of the class described the combination with a back plate of clampinglates movable thereon, a. strengtheningv lock riveted to each housing ,and aordino' a finish for each end of the b1nder,.a centrali shaft j'ournaled on the. back plate and having one end projectin through one of said housings and inturne ends on said clamping-plates extending into' the housing and those onvone side notched to clear the end of said shaft.

In testimonyT whereof I have hereunto subscribed my name in the presence of two subscribing Witnesses.A

RALPH B. WILSON. yWitnesses:

WM. C; SMITH, K. E. HANNAH.

over, 'a housing` at eaci end ofthe back and a 

